芬兰国家技术研究中心首席科学家Song Lu研究员学术报告

Negative Stacking Fault Energy in Metastable Face-centered Cubic Alloys

主讲人 : Song Lu 研究员

Stacking fault energy (SFE) plays an important role in deformation mechanisms and mechanical properties of face-centered cubic (fcc)  ls and alloys. Since early 60s, experimental methods for determining the SFE have been developed.  Nowadays, ab initio methods  d on the density functional theory (DFT) calculations and Calphad method are used for SFE calculations too. Interestingly, deviations between the results obtained by the different methods are frequently observed in some alloy systems like steels and high-entropy alloys. I will discuss the details about the methods and explore the possible reasons. I will also discuss the correlation between the negative SFE and the deformation mechanisms (twinning and martensitic transformation) and show cases that we design novel transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP) alloys using the calculated SFEs.

主讲人简介：

Song Lu，芬兰国家技术研究中心首席科学家、瑞典皇家理工学院研究员、博士生导师。先后获中科院金属所硕士学位，瑞典皇家理工学院博士学位。曾任Thermo-Calc公司研究员、瑞典皇家理工学院、芬兰图尔库大学研究员。主要研究领域为第一性原理计算，材料缺陷与力学性能。已在国际学术刊物上发表了100余篇研究论文，包括Acta Mater(13篇)、PNAS、PRB（9篇）等，负责欧盟战略规划局、瑞典钢铁协会项目5项，担任瑞典战略基金评审委员会委员。